JavaScript Minifier
Strip comments and extra whitespace from JavaScript code.
Removes comments and whitespace only — not a full AST-based minifier like Terser.
Worth Knowing
Minifying JavaScript strips comments and whitespace to shrink the file browsers must download, which directly improves page-load speed — every kilobyte counts on mobile connections. This tool does the safe, lightweight version; production build tools go further, renaming variables to single letters and eliminating dead code. The one rule minification must never break is behavior: the code has to run identically, which is why automatic semicolon insertion makes naive whitespace removal risky in JavaScript specifically.
How to Use
- Paste or type your javascript into the JavaScript Minifier above.
- The output updates instantly and is ready to copy.
- Removes comments and whitespace only — not a full AST-based minifier like Terser.